Thermophysical Properties of Additively Manufactured Ti-5553 Alloy

Abstract

The thermophysical properties of the additively manufactured, heat-treated Ti-5Al-5Mo-5V-3Cr alloy (Ti-5553), including heat capacity, thermal strain, and thermal diffusivity, were measured from room temperature to 1250°C under a protective argon environment and compared to microstructural features.  These data are used to calculate the temperature dependence of thermal conductivity at 50°C intervals. Changes observed in these thermal characterizations reflect the diffusion-controlled transformation sequence of a typical metastable b titanium alloy.  Measurements were made on material in the as-printed b phase and in a heat treated 66% α phase. A comparison of these results to published data for conventional and additively manufactured material indicates that processing and heat treatment variations have little impact on the thermophysical properties for the Ti-5553 alloy, presumably due to the heavy alloying effect.

Keywords: Ti5553, Thermophysical properties, Ti-5Al-5Mo-5V-3Cr, Additive manufacturing, Titanium